1. Concepts in Syngas Manufacture;Rostrup-Nielsen,2011
2. Steam reforming of hydrocarbons. A historical perspective
3. Syngas in perspective
4. A. Mittasch, C. Schneider, DRP 296866, BASF, 1912.
5. G. Schiller, G. Wietzel, US Patent 2026911, I.G. Farben, 1932.